【摘要】 利用半透膜将CaCl2溶液和Na2CO3溶液分开,制备了球霰石型和方解石型CaCO3,分别利用傅立叶变换红外吸收光谱(FTIR)、X-射线衍射(XRD)、扫描电镜(SEM)等测试手段进行了表征.结果表明:CaCl2溶液在半透膜内,Na2CO3溶液在烧杯中得到的晶体以亚稳态的球霰石为主,随着浓度的变化形貌有球形、椭球状、花簇状和不规则形态.Na2CO3溶液在半透膜内,CaCl2溶液在烧杯中得到的晶体主要是方解石,随着浓度的变化形貌有六面体、片层状六面体和不规则状聚集体.研究了半透膜作用下碳酸钙的多晶型和形貌,对于仿生制备碳酸钙具有一定的参考价值.更多还原

【Abstract】 CaCl2 and Na2CO3 solutions are separated by the use of semi-permeable membrane,vaterite and calcite are prepared.The samples are characterized by Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD) and scanning electronic microscopy(SEM).The results show that vaterite is mainly prepared,a metastable crystal form of CaCO3 crystals,when CaCl2 solution is in the semi-permeable membrane and Na2CO3 solution in the beaker.With the changing of the concentration,spherical,spheroid-like,flower clusters and irregular patterns of morphology exist.When Na2CO3 solution is in the semi-permeable membrane and CaCl2 solution in the beaker,with the changing of the concentratin,calcite is predominantly formed.Rhombohedra-like,layer-morphologies and bamboo-like aggregates exist.It show that under the semi-permeable membrane function,different polymorphisms and appearances of calcium carbonate are prepared.Above all,it has certain reference value regarding the biological modeling preparation of calcium carbonate.更多还原